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Re: [Openvpn-users] OpenVPN and modem-router


  • Subject: Re: [Openvpn-users] OpenVPN and modem-router
  • From: Morten Christensen <mc-openvpn@xxxxx>
  • Date: Mon, 01 Mar 2004 23:25:06 +0100

Franco Spinelli wrote:

I want to connect 2 LAN, one at office and one at home, both connected to
Internet by a modem-router (Zyxel).

My layout is:

At office:

win pc1 ---->
win pc2 ----> switch linux1 ----->
linux2 -----> modem-router ----> internet by xDSL


All machine have a private IP (192.168.0.x), linux2 and mode-router have also public static IP - linux2 have a default route to modem-router for internet
connection. So now connections go from linux2 to modem-router and from here to
internet. No NAT on modem-router or on linux2.


Do you mean that win1, win2 and linux1 is not connected to the internet at all ?

Linux2 is my public server and
the machine on wich I need to install OpenVpn


You just need to forward 1 public port in the modem-router to linux2.

At home:

win pc1 ---->
win pc2 ----> hub ---> modem-router ----> internet by ADSL
linux1 ----->


All machine have a private IP (192.168.0.x), modem-router have a public dynamic
IP - All machine have a default route to modem-router and modem-router is able
to NAT private IP
Linux1 is the machine on wich I need to install OpenVpn.


The public dynamic IP means, that it will be difficult to initiate the tunnel from work, unless linux1 runs a dyndns-service or yopu keep the tunnel alive all the time with ping-commands.

Is a schema as shown compatible with OpenVpn ?



Is is a disadvantage, that you use the same private subnet 192.168.0.x both at work and at home. That will make it difficult (maybe impossible) to reach other PC's than the OpenVPN-server on the other lan.



-- mvh Morten Christensen


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